Researchers from the Musculoskeletal Research Unit at the University of Bristol have identified the most important risk factors for developing severe infection after hip replacement. Patients who are under 60 years of age, males, those with chronic pulmonary disease, diabetes and a higher body mass index are at increased risk of having the joint replacement redone (known as revision) due to infection. The research also showed that some patients are at risk of early infection whilst others are more prone to late infection after hip replacement.